Chapter 5.3, Problem 2P

a.

To determine

To Find: What percent of the world’s land area has the United States.

Answer to Problem 2P

Percent of United states land area in World’s land area $=6.28\%$

Explanation of Solution

Given information:

Table represents the population and Area of each country.

Given

Land Area of USA $=u=9.36\times {10}^6$

Land Area of world $=w=1.49\times {10}^8$

Therefore,

Percent of United states land area in World’s land area $=\frac{u}{w}\times 100$

  $\Rightarrow$ Percent of United states land area in World’s land area $=\frac{9.36\times {10}^6}{1.49\times {10}^8}\times 100$

  $\Rightarrow$ Percent of United states land area in World’s land area $=\frac{9.36\times {10}^8}{1.49\times {10}^8}$

  $\Rightarrow$ Percent of United states land area in World’s land area $=\frac{9.36}{1.49}$

  $\Rightarrow$ Percent of United states land area in World’s land area $=6.28\%$

Therefore.

Percent of United states land area in World’s land area $=6.28\%$

b.

To determine

To Find: What percent of the world’s land area has the China.

Answer to Problem 2P

Percent of China land area in World’s land area $=6.44\%$

Explanation of Solution

Given information:

Table represents the population and Area of each country.

Given

Land Area of China $=c=9.60\times {10}^6$

Land Area of world $=w=1.49\times {10}^8$

Therefore,

Percent of China land area in World’s land area $=\frac{c}{w}\times 100$

  $\Rightarrow$ Percent of China land area in World’s land area $=\frac{9.60\times {10}^6}{1.49\times {10}^8}\times 100$

  $\Rightarrow$ Percent of China land area in World’s land area $=\frac{9.60\times {10}^8}{1.49\times {10}^8}$

  $\Rightarrow$ Percent of China land area in World’s land area $=\frac{9.60}{1.49}$

  $\Rightarrow$ Percent of China land area in World’s land area $=6.44\%$

Therefore.

Percent of China land area in World’s land area $=6.44\%$

c.

To determine

To Find: What percent of the world’s land area has the Italy.

Answer to Problem 2P

Percent of Italy land area in World’s land area $=0.2\%$

Explanation of Solution

Given information:

Table represents the population and Area of each country.

Given

Land Area of Italy $=i=3.01\times {10}^5$

Land Area of world $=w=1.49\times {10}^8$

Therefore,

Percent of Italy land area in World’s land area $=\frac{i}{w}\times 100$

  $\Rightarrow$ Percent of Italy land area in World’s land area $=\frac{3.01\times {10}^5}{1.49\times {10}^8}\times 100$

  $\Rightarrow$ Percent of Italy land area in World’s land area $=\frac{3.01\times {10}^7}{1.49\times {10}^8}$

  $\Rightarrow$ Percent of Italy land area in World’s land area $=\frac{3.01}{1.49\times 10}$

  $\Rightarrow$ Percent of Italy land area in World’s land area $=\frac{3.01}{14.9}$

  $\Rightarrow$ Percent of Italy land area in World’s land area $=0.2\%$

Therefore.

Percent of Italy land area in World’s land area $=0.2\%$